JP2863802B2 - Construction method of dome frame - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of constructing a dome frame suitable for a roof of a multipurpose stadium or the like.

"Conventional technology" Generally, there is a dome frame as one of roof structures for securing a large space such as a stadium, a multipurpose hall, and an experimental building. This dome frame is a structure in which an arched steel truss is radiated from the top to the upper part of the lower structure to form a dome-shaped roof.For example, when applied as a baseball stadium, 60 m or more to allow baseball in the dome It is possible to secure a high space with an effective height of.

Conventionally, as a method of erection of such a dome-shaped roof, a method as shown in FIG. 12 is known.

According to this conventional method, several rows of supports 3 corresponding to the arch height of the steel truss 2 are arranged at the erection positions of all the steel trusses 2 inside the lower structure 1, and at each erection position, The divided units 4 of the truss 2 are erected between the corresponding supports 3 while being lifted by the crawler crane 5 or the like, and the divided units 4 are joined to form the steel trusses 2 respectively. By forming the bridge, the entire dome-shaped roof is bridged.

[Problems to be Solved by the Invention] However, according to the above-described conventional erection method, all the steel trusses 2 to be erected require erection supports 3 and a large number of erections 3 are required. However, the building had to be built and constructed on the roof construction site.

In particular, in the case of construction of a baseball dome, the amount of steel frames used for the entire support work becomes enormous, such as requiring a support 3 with a height of about 70 m at the center, and the temporary work of the support becomes large, There was a drawback that the temporary cost was great. For this reason, it was not possible to effectively reduce the construction cost.

Further, all the steel trusses 2 are constructed at the respective construction positions, and the number of cranes is limited, so that the work efficiency cannot be said to be good, and the construction period cannot be effectively reduced. Was. In particular, since the shoring work is to be built over the entire area where the roof is to be erected, ground construction cannot be performed during the roof erection work, and this also causes the construction period to be prolonged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of erection of a multi-layered dome frame that can effectively reduce the erection cost and the construction period, thereby realizing an economical framing. And

[Means for Solving the Problems] The present invention relates to a method of erection of a dome frame composed of an arch-shaped framing unit radially divided from a top portion on a lower structure. And place the frame unit 1 from a desired position in the erection range.
By sequentially rotating the erected frame unit around the erection gantry while erection between the erection gantry and the lower structure by unit or several units,
All the frame units are arranged radially to form a dome frame, and the frame unit at the end of the dome frame is used as a work stage, and an upper dome frame is erected by the same erection procedure as the lower dome frame. It is characterized by doing so.

According to the present invention, the erection unit is installed between the erection unit at the center of the erection range and the lower structure around the erection unit from the end of the erection range by one unit or several units. By sequentially rotating and moving in the direction of the erection range and arranging the respective frame units radially, the entire lower dome frame is formed.

Then, using the frame unit at the end of the lower dome frame as a work stage, a new frame unit is erected between the erection gantry and the lower structure, and the entire upper dome frame is formed by the same means as the lower dome frame. Will be done. In this way, by using the existing frame unit at the end of the dome frame for the work stage, the dome frame can be laid over two or three layers on the work unit, and a multi-layer dome frame can be erected.

In this case, first, since only the central erection gantry and work stage for erection of one unit or several units are sufficient for the erection of the lower dome frame, no erection is required for the entire erection area. Accordingly, simultaneous construction of the lower structure is possible in a construction area other than the construction gantry and the work stage. In addition, since the lower frame unit can be used as it is as a work stage for the dome frame after the second layer,
The first working stage can be removed and performs the same effect as above.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 11 show an example in which the present invention is applied to a retractable roof in a stadium such as a baseball field. In FIG. 1 and FIG. 2, the stadium is indicated by reference numeral 10 as a whole.

The stadium 10 comprises a substantially circular ground 11, spectator seats 12 (both for roof construction) 12 provided around the ground 11, and a retractable roof 13 covering the whole of the ground 11 and the spectator seats 12. I have.

FIG. 1 shows the closed state of the retractable roof 13.
The roof 13 as a whole has a circular planar shape and is formed in an upwardly convex dome shape with a spherical body turned down.

The roof 13 is divided into approximately two right and left sides from the center of the circle in plan view, and one (infield side) is a parent roof 14 and the other (outfield side) is a child roof 15. The parent roof 14 has a radius of curvature larger than that of the child roof 15 by approximately the roof thickness. Therefore, the child roof 15 is configured to be superimposable below the parent roof 14.

The parent roof 14 and the child roof 15 are supported by a substantially annular support structure (lower structure) 16 provided around the audience seats 12. The support structure 16 includes a semi-annular sub-roof support section 17 positioned below the closed roof 15 and a uni-roof support section positioned below the main roof 14 and extending in one direction away from the end of the audience seat 12. And a parent roof support 18 having a shape.

As shown in FIGS. 2 and 3, an annular track 19 having a diameter slightly smaller than a semicircle of the child roof 15 in a planar shape is formed in the child roof support portion 17. This track 19 is
Is formed in a groove having a bottom surface 20 in the normal direction at the end of the substrate and side surfaces 21 and 21 rising vertically from above and below. On the other hand, at the end of the child roof 15, as shown in FIG.
A truck 22 with a drive mechanism having a shape fitting into the track 19 is provided, and the bottom surface 20, and the side surface 21, of the truck 22 and the track 19,
The traveling wheels 23 are arranged between the traveling wheels 21 and 21. Thereby, the child roof 15 is configured to be rotatable around the circular center of the roof 13.

On the other hand, as shown in FIGS. 1, 2, and 4, between the upper surface of the parent roof support portion 18 and the parent roof 15,
A moving bed 24 with a horseshoe-shaped drive mechanism having an outer circle slightly larger than the outer circle of 15 is interposed, and this moving bed 24 is
Are placed on tracks 25, 25,... Laid on the upper surface of the main roof support portion 18.

As shown in FIG. 4, the moving bed 24 is
The base 27 is provided at a lower end of the base 27 via a pin bearing 26, and running wheels 28 are provided on the lower surface of the base 27. A track 29 is formed on the base 27 at the same position as the track 19 of the sub-roof support portion 17.
Accordingly, the sub-roof 14 is rotatable not only along the track 19 of the sub-roof support section 17 but also along the track 29 of the parent roof support section 18 and around the circular center of the roof 13 around the entire circumference. Have been.

The cart 22 and the moving bed 24 may be operated by using a well-known means such as an operator appropriately giving an instruction by remote control, and it is not necessary to use any special means.

The tracks 25 on the parent roof support portion 18 are installed at both ends of the parent roof 15 and at required positions, and extend in parallel with the extending direction of the parent roof support portion 18, respectively. It has a configuration. Therefore, the parent roof 14 and the child roof
The movable bed 15 is configured to be able to retreat from the spectator seat 12 (and the ground 11) when the movable bed 24 moves along the tracks 25,.

Incidentally, as shown in FIG. 1, the main roof 14 constituting the roof 13 has a plurality of arch-like structures which are erected from the top 30 to the upper surface of the moving bed 24 at regular intervals (in the present embodiment, at intervals of 7.5 degrees). The steel truss 31 is mainly configured. As shown in FIG. 4, the steel truss 31 is constructed by assembling each member of an upper chord material 32, a lower chord material 33, and a lattice material 34 connecting these members to each other in a box shape. In addition, between the steel trusses 31, 31 laid radially at regular intervals, a connecting material 35 such as a linking material, a brace material, etc. was interposed, so that all the steel trusses 31 were connected to each other in the circumferential direction. It has a structure.

Similarly, as shown in FIG. 1, in the closed state, the sub-roof 15 is provided with a plurality of arched steel frames erected from the top 30 on the carriage 22 at regular intervals (in this embodiment, at 7.5-degree intervals). The truss 36 is mainly used, and the connecting member 35 is similarly interposed between the adjacent steel trusses 36, 36, so that all the steel trusses 36 are connected to each other in the circumferential direction.

In the retractable roof 13 having the above configuration,
It has the following opening and closing actions.

As shown in Fig. 5 (a), the child roof 15 is
If the parent roof 14 is located on the right side of the ground 11 and the child roof 15 and the parent roof
14 integrally covers the ground 11 and the audience seat 12 above,
A large roof is formed on the ground 11 and the like. As a result, the ground 11 and the spectator seat 12 are able to withstand rain and wind, so that even in bad weather, people can fully enjoy the game and watching the game.

On the other hand, in order to open the openable roof 13, a command is issued by remote control to start the movement of the movable carriage 22 located at the end of the sub-roof 15. As a result, the bogie 22 moves on the track 19 toward the parent roof 14, and as shown in FIG. 5 (b), the child roof 15 also moves with it.
Move until it is superimposed under the parent roof 14. As a result, as shown in FIG. 5 (c), the portion of the sub-roof 15 is greatly opened.

Next, with the child roof 15 superimposed under the parent roof 14,
A command is issued by remote control to start moving the moving bed 24 located at the end of the main roof 14. This allows moving beds
Track 24 moves away from spectator seat 12 in the direction of distance 25, ...
By moving up, the child roof 15 and the parent roof 14 also move with it. As a result, as shown in FIG.
Most of the roof 13 has a large opening, and the ground 11 and the audience seats 12 have the roof removed at this portion.
As a result, the people in the audience seats 12 can enjoy the sunlight and the breeze from the opening.

In order to change the state from this state to the state shown in FIG.
What is necessary is just to move the moving bed 24 in the direction opposite to the above-mentioned direction.

Thus, the openable roof 13 having the above-described configuration
According to, the child roof 15 is rotated and moved below the parent roof 14,
Further, by moving the child roof 15 and the parent roof 14 in a direction away from the spectator seat 12, the roof can be opened and closed, and the opening and closing of the ground 11 and the spectator seat 12 can be performed completely freely and easily, Responding to the weather is at your disposal.

In the stadium 10 having the structure described above, the erection of the openable roof 13 is performed as follows.

[Construction of Child Roof 15] (1) As a preparation stage, as shown in FIGS. 6 and 7, on the ground 11, a construction gantry 40 is erected at the center of the construction area of the roof 13 to be constructed. Similarly, a work stage 41 extending in the centrifugal direction from the erection gantry 40 at the end of the erection range.
Is temporarily established. On the upper surface of the erection gantry 40, a centered annular pin support with jacks 42 is provided. Further, on the upper surface of the erection gantry 40 near the pin bearing 42 and on the upper surface of the work stage 41, roller bearings 43 and 44 with jacks are provided at supporting positions of the steel truss 36, and on the upper surface of the moving bed 24, the steel truss 36 is provided. A pin bearing 26 for supporting the lower end is provided.

(2) On the other hand, on the ground, upper chord 32, lower chord 32,
Two girders composed of lattice members 34 are laid in a box shape, and the required number of steel trusses 36 of the same shape, which is obtained by dividing the roof 13 radially at equal intervals, is manufactured. Each of the steel trusses 36 is divided into workable truss units 37 in consideration of the workability and safety at the time of lifting and erection. In this embodiment, the tip angle of each steel truss 31 is set to 7.5 degrees, and each is divided into four in the centrifugal direction.

(3) First, the first steel truss 36 is erected (see FIGS. 6 and 7). In this case, each steel truss unit 37 constituting the steel truss 36 is lifted on the work stage 41 by the crane 5 at the end of the erection range. Then, on the work stage 41, each steel truss unit
37, corresponding roller bearings 43, 44, and moving bed
An adjacent steel truss unit installed between carts 22 on 24
37 are joined together by welding or the like, thereby connecting the entire steel truss 36, and the steel truss 36 is erected between the erection gantry 40 and the carriage 22 of the movable bed 24.

In this erection state, since the upper end side of the steel truss 36 is supported by the roller bearings 43 and 44, the thrust force (horizontal reaction force) from the steel truss 36 is released to the outside by the rollers, and the erection gantry 40 Stage 41 receives no thrust. In addition, the deformation of the roller bearings 43 and 44 in the vertical direction is adjusted by a jack and restrained, so that the deformation of the roller in the truss direction can be reduced.

(4) When the installation of one unit of the steel truss 36 is completed, the roller bearings 44 on the work stage 41 are jacked down. At this time, a slight deformation and bending occur in the truss direction at the upper end of the steel truss 36 on the erection gantry 40. Such deformation and deflection cause the upper end of the steel truss 36 to
If it is supported first, a thrust force is generated at the upper end of the steel truss 36. However, in the case of the present application, since the upper end of the steel truss 36 is supported by the roller bearing 43 as described above, the thrust force is released to the outside by the roller, and the erection gantry 40 itself does not receive the thrust force. become. Therefore, rational structural design of the erection gantry 40 is enabled.

(5) After jacking down, the steel truss 36 is regarded as a simple beam structure supported only by the roller bearings 43 and the bogie 22 at both ends. Therefore, the maximum stress and the maximum bending occur in the steel truss. Therefore, the following measures are taken in consideration of the state of the steel truss 36 after jack down.

(6) An increase in stress is dealt with by reinforcing the steel truss 36. At this time, the steel truss 36 is provided with a camber in advance in consideration of deformation. In addition, a PC steel wire is stretched between the upper and lower ends of the steel truss 36 to introduce a prestress into the steel truss 36, thereby reducing the stress load and suppressing the deformation of the steel truss 36.

(7) Next, the upper ends of the chord members 32 and 33 of the steel truss 36 supported by the roller bearing 43 are pin-supported on the erection gantry 40.
The truss 36 is joined to the truss 42 by using a joining material 45 that is fitted on site, thereby completing one unit of the steel truss 36. In this case, as a joining means, any of a method of inserting the tip of the connecting material 45 at the upper end of the steel truss 36 into the annular pin bearing 42 and bolting the tip and the pin bearing 42 or a method of welding is used. Good. In this case, there is an advantage that the upper end portions of the steel trusses 36 concentrated on the top portion 30 are better fitted. Note that the roller bearing 43 is subsequently removed.

Here, the upper end of the steel frame truss 36 is not joined to the pin bearing 42 first, but the connecting material 45
Because it is joined to the pin bearing 42 through the, the construction error etc. can be absorbed at the center, and compared to the case where the pin bearing 42 is joined from the beginning, the steel truss 36
Concentration of stress and deformation on the substrate can be prevented.

(8) Next, the steel truss 36 is rotationally moved in the circumferential direction by an angle of two units (15 degrees) around the pin bearing 42 as an axis.

In this case, since the leg (lower end) of the steel truss 36 is supported by the trolley 22 running in the groove on the upper surface of the moving bed 24, the truss 36 is moved by moving the trolley 22 along the track. It can be rotated and moved. Or,
By pulling or pushing the bogie in a tangential direction with a hydraulic jack or the like while the cart is free, the steel truss 36 can be rotated and moved by a desired angle.

(9) Next, at the place where the steel truss 36 is erected, the second steel truss 36 is erected on the work stage 41 between the erection gantry 40 and the next carriage 22 on the moving bed 24 (see FIG. 8). ). The erection method is as described above (step (3) to step (7)).

(10) Then, a connecting material 35 such as a brace material, a connecting material, or the like is installed between the steel truss 36 and the first steel truss 36 that has been previously rotated by 15 degrees. The length dimension of each member of the connecting member 35 needs to be determined in consideration of deformation after jack down.

(11) Next, the second steel truss 36 is rotated 15 degrees in the circumferential direction together with the first steel truss 36 by the method of step (8). In this case as well, the carriage 22 may be driven by itself, or the leading steel truss 36 may be pulled tangentially with a PC steel wire and rotated as a whole.

(12) Similarly, by repeating the above-mentioned steps (3) to (8) for the remaining steel trusses 36 temporarily placed on the ground, the remaining steel trusses 36 are placed one by one at the end of the installation range. It is erected and sequentially rotated forward by 15 degrees.

In this way, by erection of the last steel truss 36 at the end of the erection range, all the steel trusses 36 are arranged radially from the pin bearing 42 of the erection gantry 40,
The construction of the entire sub-roof 15 is completed (see FIG. 9).

[Erecting of the parent roof 15] (13) After the erection of the child roof 15 is completed as described above, the erection work of the parent roof 14 is performed.

First, as shown in Fig. 9, the child roof 15 is positioned directly below the area where the parent roof 14 is to be installed, and the child roof 15
Match the 15 ends. The steel truss 36A at the end of the child roof 15 is used as a work stage for erection of the main roof 14. Therefore, the work stage 41 immediately below is unnecessary, so that it is removed, and the center erection gantry 40 is left as it is for erection of the parent roof 14. Then, as shown in FIG. 10, an annular centered pin support 50 with a jack is provided on the top 30 of the sub-roof 15. Further, on the side of the pin bearing 50 and on the upper surface of the steel truss 36A, roller bearings 43 and 44 with jacks are provided at supporting positions of the steel truss 31, and on the upper surface of the moving bed 24, the lower end of the steel truss 36 is provided in a circumferential direction. A slide rail 51 in the form of a groove for rotation and movement is laid, a sliding carriage 52 is provided in the slide rail 51, and a pin bearing 26 for supporting the lower end of the steel truss 36 is provided on the sliding carriage 52.

(14) On the ground, as in the case of the steel truss 36 of the sub-roof 15, two girders composed of the upper chord 32, the lower chord 32, and the lattice 34 are laid in a box shape to form the parent roof 14. A steel truss 31 is manufactured, and each steel truss 31 is divided for the same reason as the steel truss 36 to form a steel truss unit. In the present embodiment, the tip angle of each steel truss 31 is set to 7.5 degrees, and each is divided into four in the centrifugal direction.

(15) After each steel truss unit is lifted by the crane 5 on the steel truss 36A at the end of the sub-roof 15, each steel truss unit 37 is supported on the steel truss 36A, and the corresponding roller bearings 43 and 44, and the moving bed. The steel truss units 31 are connected between the pin bearings 26 on the base 24, and the adjacent steel truss units are joined to each other by welding or the like, thereby connecting the entire steel truss 31. It is erected between 52.

In this erection state, since the upper end side of the steel truss 31 is supported by the roller bearings 43 and 44, the thrust force (horizontal reaction force) from the steel truss 31 is processed by each roller, and the erection gantry 40, the steel truss 36A Does not receive thrust.

(16) When the installation of one unit of the steel truss 31 is completed, the roller bearings 43 and 44 on the intermediate steel truss 36A are jacked down. Then, the upper ends of the respective chords 32, 33 of the steel truss 31 supported by the roller bearing 43 are joined to the pin bearing 50 on the top 13 of the sub-roof 15 by using a joining material 45 by site adjustment, Thus, one unit of the steel truss 31 is completed. In this case, the joining means may be the same as the above-described steel truss 36.

(17) In addition, the following processing method may be used for fitting the upper end of each steel truss 31.

That is, as shown in FIG. 11, after the sub-roof 15 is erected,
The pin bearing 43 on the top 30 is jacked down so that the child roof 15 becomes independent. Further, on the upper surface of the erection gantry 40, a second erection gantry 53 for erection of the main roof 14 is provided independently of the child roof 15,
53 A centered annular pin bearing 42 is provided on the upper surface. In this state, the steel truss 31 is attached to the roller bearing 43 on the top of the erection gantry 53.
Of the steel truss 31 and finally connect the upper end of the steel truss 31 with the connecting material 45.
To the pin bearing 42 via. According to this method, since the thrust force due to the reaction force of the main roof 14 is processed in the sub-roof 15, there is an advantage that the thrust force is not transmitted to the erection gantry 53.

(18) Next, the steel truss 31 is rotationally moved by an angle of two units (15 degrees) in the circumferential direction around the pin bearing 50 as an axis. In this case, since the leg (lower end) of the steel truss 31 is supported by the sliding carriage 52 in the slide rail 51 on the upper surface of the moving bed 24, the sliding carriage 52 is pulled by using a PC steel wire and a jack. The sliding trolley 52 can slide on the slide rail 51, and the steel truss 31 can be rotated.

(19) Further, the second steel frame truss 31 is erected on the steel truss 36A between the erection gantry 40 and the next sliding vehicle 52 on the moving bed 24. The erection method is as described above (step (3) to step (7)).

(20) In addition, a connecting member 35 such as a brace material or a connecting material between the steel truss 31 and the first steel truss 31 previously rotated by 15 degrees is constructed. Then, the second steel truss 31 is rotated 15 degrees in the circumferential direction together with the first steel truss 31 by the method of step (8).

(21) Similarly, for the remaining steel trusses 31 temporarily placed on the ground, the above-mentioned steps (3) to (8) are repeated to place the remaining steel trusses 36 on the steel truss 36A one by one. After installing the connecting member 35, the connecting member 35 is sequentially rotated forward by 15 degrees. In this manner, by erection of the last steel truss 31 at the end of the erection range, all the steel trusses 31 are radially arranged from the pin bearings 50 of the erection gantry 40, and the entire parent roof 15 is The erection will be completed.

(22) Finally, by simultaneously jacking down the pin bearings 42 and 50 supporting the child roof 15 and the parent roof 14 at the top 13, respectively, the steel trusses 36 of the child roof 15 and the parent roof 14 are obtained. , 31... Are lowered to the design height at the same time, the parent roof 14 and the child roof 15 are made independent, the top 30 is constructed, and the construction of the entire roof 13 is completed. The erection gantry 40 is subsequently removed. Ancillary work for each large roof 14 and sub-roof 15 will be carried out simultaneously with the erection work.

 According to this embodiment, the following effects can be obtained.

When installing the parent roof 14, the steel truss 36A at the end of the existing child roof 15 can be used as it is as a work stage for installing the parent roof 14, so there is no need to construct a new work stage. Temporary members and temporary work required for the construction can be omitted, and the cost of temporary construction can be reduced.

In addition, since the work stage 41 of the child roof 15 is unnecessary and can be removed, the erection work of the parent roof 14 can be performed while leaving only the erection gantry 40 on the ground 11, and simultaneous construction on the ground 11 during that time can be performed. Widely possible. Thus, the construction period of the stadium 10 can be shortened and productivity can be improved.

The main roof 14 is constructed such that each of the steel trusses 31 is erected one by one on the steel truss 36A at the end of the sub-roof 15 between the erection gantry 40 and the support bed 42, and sequentially around the pin bearings 42 of the erection gantry 40. Since the entire roof is erected by rotating on the slide rail 51, the erection work is a repetition of a simple process, the erection work is safe, and the work efficiency is good.

Similarly, the sub-roof 15 has the same installation procedure as the main roof 14, so that a similar effect can be obtained.

In the construction work for the sub-roof 15, the central erection gantry 40
It is enough to support only the work stage 41 for one unit. Therefore, no support is required for all the steel trusses 36, the number of supports is greatly reduced, and the amount of steel required for the support is significantly reduced. This allows
Temporary costs can be reduced. Further, the number of the cranes 5 is sufficient for one unit, and the moving range of the cranes 5 is sufficient in a fixed narrow range.
Work safety is also high.

In addition, the steel truss 36
Therefore, in the construction work of the child roof 15, the other ground 11 is an open space, and the simultaneous construction of the ground 11 can be widely performed similarly to the construction work of the parent roof 14.

The support condition of the top part of each parent roof 14 and child roof 15 is first set as a roller bearing 43, and then the roller support 44 in the middle part is jacked down and deformed in advance, and then the pin support is connected via a connecting material 45. Since it is made to be joined and supported by 42, the central erection gantry 40 does not receive the thrust force as the reaction force of each steel truss 31, 36 of the parent roof 14, child roof 15,
Thus, a rational design of the erection gantry 40 can be achieved.

In this way, it is possible to construct the lower roof 15 and the upper parent roof 14 by stacking them in this order by using substantially the same construction procedure. Economical construction can be achieved. Accordingly, the erection method according to the present invention can be suitably used for erection of an openable roof which is divided into a large number of parts, such as a three-story roof and a four-story roof, as well as a two-story roof.

In the present embodiment, each steel truss 31.
.. Are lifted and erected one unit at a time, and are rotated sequentially. Alternatively, a method of laying several units at a time and rotating and moving them together to lay a roof may be adopted.

[Effects of the Invention] As described above in detail, the present invention relates to a method of constructing a dome frame composed of an arch-shaped frame unit radially divided from the top on the lower structure, A erection gantry is arranged at the center of the erection unit, and while the erection unit is erected between the erection gantry and the lower structure one unit or several units at a time from the end of the erection range, the erection unit is rotated around the erection gantry. By sequentially rotating the frame unit, the frame units are radially arranged to form a lower dome frame, and the frame unit at the end of the dome frame is used as a work stage, and the same as the lower dome frame. Since the upper dome frame is erected by the erection procedure, the following effects are obtained.

When the lower dome frame is erected, only one or a few units at the end of the erection area need to be erected. Therefore, erection is required for other erection areas, reducing the number of erections and temporary costs. Can be reduced. Also, when the upper dome frame is erected, the frame unit at the end of the lower dome frame can be used as a work stage, and the dome frame of the lower dome frame is constructed using substantially the same means as the lower dome frame. As in the case of erection, no support work is required, and the cost of temporary construction can be further reduced.

Further, since almost all of the work of erection of the lower and upper dome frames is performed at the ends of the erection range, the work range is narrow, and the work efficiency and work efficiency can be improved. A heavy crane is sufficient at the end, so safe work can be ensured. Thereby, the construction cost can be significantly reduced in addition to the above-described reduction in the temporary construction cost.

In addition, as described above, since it is possible to reduce the number of supports in the erection range, it is possible to simultaneously construct the lower structure immediately below the erection range, and it is possible to improve productivity.

As described above, by using the dome frame erection method of the present invention, it is possible to safely and easily realize an extremely economical multi-layer dome frame.

[Brief description of the drawings]

1 to 11 show an embodiment of the present invention. FIG. 1 is a plan view of an openable roof, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view showing an end of a child roof. Fig. 4, Fig. 4 is a sectional view showing the end of the main roof, Figs. 5 (a) to 5 (d) are plan views showing the operation of the openable roof, and Fig. 6 is a plan view showing the work of erection of the child roof. , FIG. 7 is a cross-sectional view thereof, FIG. 8 is a plan view showing the work of erection of the child roof, FIG. 9 is a plan view showing the completion of erection of the child roof, and FIG. Figure, No.
Fig. 11 is a sectional view showing the work of erection of the parent roof by another method.
FIG. 12 is a sectional view showing a conventional example of the erection method. 10… Stadium, 11… Ground, 12… Audience seats, 13… Retractable roof, 14… Parent roof (upper dome frame), 15… Child roof (lower dome frame), 16… Supporting structure (substructure), 24… Movable bed, 30 …… Top, 31, 36 …… Steel truss (frame unit), 36A …… Steel truss at the end, 40 …… Building gantry, 41 …… Work stage.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshihiko Hirama 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Ichiro Kusama 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Inside (72) Inventor Kenichi Sugisaki 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (72) Inventor Honda Kyushu 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation ( 72) Inventor Shuji Okuda 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yoshio Takigami 4--18-32 Shibaura, Minato-ku, Tokyo Inside Tokyo Steel Frame Bridge Co., Ltd. 72) Inventor Jin Takagi 4- 18-32 Shibaura, Minato-ku, Tokyo Inside the Tokyo Steel Bridge Bridge Manufacturing Co., Ltd. (72) Koichi Satsuki 4-18-32 Shibaura, Minato-ku, Tokyo (56) References JP-A-62-242037 (JP, A) JP-A-2-292432 (JP, A) JP-A-61-60938 (JP, A) 53-51446 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 7/16 E04B 1/32 102

Claims (1)

(57) [Claims] In a construction method for constructing a dome frame composed of an arch-shaped frame unit radially divided from a top on a lower structure, a erection gantry is arranged at the center of the erection range, and the erection frame is positioned from an end of the erection range. By arranging the frame units one by one or several units between the erection gantry and the lower structure while sequentially rotating the erected frame units around the erection gantry, the frame units are radially arranged. A lower dome frame is formed, and a frame unit at an end of the dome frame is used for a work stage, and an upper dome frame is erected by the same erection procedure as the lower dome frame. Dome frame construction method.